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Preparation of Silica Nanoparticles from Organic Laboratory Waste of Silica Gel HF254 and Their Use as a Highly Efficient Catalyst for the One-Pot Synthesis of 2,3-Dihydro-1H-isoindolone Derivatives

✍ Scribed by Ali Ramazani; Amir Mahyari; Azam Farshadi; Morteza Rouhani

Publisher
John Wiley and Sons
Year
2011
Tongue
German
Weight
505 KB
Volume
94
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Reaction of an isocyanide with an iminium ion intermediate, formed by reaction between 6‐formyl‐2,3‐dimethoxybenzoic acid and secondary amines (dibenzyl‐ or benzyl(isopropyl)amine) in the presence of silica nanoparticles (silica NPs, ca. 70 nm) proceeds smoothly at room temperature to afford 2,3‐dihydro‐1__H__‐isoindolone derivatives in high yields.

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## Abstract Multicomponent reaction of o‐formylbenzoic acid derivative (I) with secondary amines (III) and isocyanides (II) proceeds smoothly in the presence of silica nanoparticles under neat conditions to give dihydroisoindolone derivatives (IV) in good yields.

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## Abstract Reaction of an isocyanide with an electron‐poor aromatic aldehyde in the presence of silica nanoparticles (silica NP; __ca.__ 42 nm) proceeds smoothly at room temperature to afford 2‐hydroxyacetamide derivatives in high yields (__Scheme 1__ and __Table 1__).